Originally Posted by Coup D'etat

According to dictionary.com:

3 entries found for Coup D'etat.
coup d'é·tat Audio pronunciation of "Coup D'etat" ( P ) Pronunciation Key (k d-tä)
n. pl. coups d'état (k) or coup d'états (d-täz)

The sudden overthrow of a government by a usually small group of persons in or previously in positions of authority.